负载型ZnCl2/AC催化剂用于乙二醇氢氯化反应的研究

Study on loaded ZnCl2/AC catalyst for ethylene glycol hydrochlorination reaction

赵萌达 ¹郭豹 ¹李文松 ¹刘继东 ²吕建华²

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作者信息

1. 河北工业大学化工学院,天津 300130
2. 河北工业大学化工学院,天津 300130;天津市本质安全化工技术重点实验室,天津 300130
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摘要

采用湿浸渍法制备了ZnCl2/AC(活性炭)催化剂并用于乙二醇氢氯化反应合成2-氯乙醇,通过XRD、FT-IR、Py-IR和N2等温吸附-脱附等手段对催化剂进行表征,考察了ZnCl2负载量对AC的物化性质和催化活性的影响.结果表明,负载ZnCl2后,AC上的Lewis酸位点数量显著增加,催化活性得到显著增强.在温度为220℃、LHSV为1 h-1、n(HCl)/n(EG)为2︰1时,10％ZnCl2/AC催化剂表现出最佳催化性能,乙二醇转化率和2-氯乙醇选择性分别为88.26％和93.57％.

Abstract

ZnCl2/AC catalysts are prepared through a wet impregnation method,and used in the hydrochlorination of ethylene glycol,aiming for efficient and safe synthesis of 2-chloroethanol and addressing the current surplus of ethylene glycol.The catalysts prepared are fully characterized by means of XRD,FT-IR,Py-IR and N2 isothermal adsorption-desorption.The influences of ZnCl2 loading amount on the physical and chemical properties and catalytic activity of activated carbon(AC)are investigated.Results show that the loading of ZnCl2 significantly increases the number of Lewis acid sites on AC,therefore enhances the catalytic activity significantly.At a temperature of 220℃,LHSV of 1 h-1,and n(HCl)/n(EG)ratio of 2∶1,the 10％ZnCl2/AC catalyst exhibits the best catalytic performance with an ethylene glycol conversion rate of 88.26％and a 2-chloroethanol selectivity of 93.57％.

关键词

2-氯乙醇/乙二醇/氢氯化反应/锌基催化剂/固定床反应器

Key words

2-chloroethanol/ethylene glycol/hydrochlorination/Zn-based catalyst/fixed bed reactor

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出版年

2024

现代化工

中国化工信息中心

现代化工

CSTPCDCSCD北大核心

影响因子：0.553

ISSN：0253-4320

参考文献量3

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